test-drb December 1998

test-drb@ccmp.vtda.org

168 participants
844 discussions

by jfoust＠threedee.com

At 06:43 AM 12/12/98 -0500, Doug Spence wrote: > >On Tue, 8 Dec 1998, Chuck McManis wrote: > >> Dale Luck has PCC newspaper vol1 number 1. It was a hoot to read through! > >Oooh, name dropping! Don't forget, you can also impress people by dropping Chuck McManis' name in conversation. :-) - John

25 years, 7 months

Comterm Hyperion - Boot disk?

by gregorym＠cadvision.com

Hi. I recently acquired a Hyperion "portable" PC - Mac-influenced, 8086, dual 5.25 floppies, built in 4" amber monitor. I can't seem to get it to boot, however. When I power it up, I get a flashing cursor, and the system tries both drives. Then I get a "DISK FAULT" error on screen. I've tried various versions of DOS, from 2.1 to 3.3, with the same result. Does the Hyperion require an earlier version of DOS, or a customized version? Or, do I just have a machine with defunct floppy drives? Any help much appreciated. Mark Gregory

25 years, 7 months

Linux or what?

by roblwill＠usaor.net

Thanks! I'll check it out. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: Doug Yowza <yowza(a)yowza.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Sunday, December 20, 1998 3:35 PM Subject: Re: Linux or what? >On Sun, 20 Dec 1998, Jason Willgruber wrote: > >> O.K. I think I'll try Minix, but where can I get it?? I can't seem to find >> it on the web anywhere (using WebCrawler). Does anyone have a copy that >> they could email, or a website to go to to download it? > > http://www.cs.vu.nl/~ast/minix.html > >-- Doug > >

25 years, 7 months

New Acquisition: Motorola "Exorcisor" 6800 Development System

by mcquiggi＠sfu.ca

Hi Gang: This afternoon I acquired the above system. There's a main system unit, a separate unit with dual 8" floppies, a SOROC Technology dumb terminal, a good stock of development cards, and what appears to be a full set of documentation and software on 8" floppies. Any info on this system, which appears from a cursory look at the docs, to have been a development system for standalone 6800-based industrial controls, would be appreciated. Thanks, Kevin -- Kevin McQuiggin VE7ZD mcquiggi(a)sfu.ca

25 years, 7 months

(1960 kit) long and OT-ish.

by SUPRDAVE＠aol.com

In a message dated 12/20/98 10:28:44 PM EST, ard(a)p850ug1.demon.co.uk writes: << I am not going to be silly. I am not going to stick my fingers into a live mains socket, or use a machine tool when I'm not concentrating, or anything like that. But equally I'm not giving up the enjoyment I get from life because I could possibly have an accident and might therefore shorten my life. And for any lawyers here, I am quite prepared to take responsibility for my actions. If I do something wrong, then that's _my_ fault, right. Not the person who supplied whatever I happened to be using at the time. Not even if the whatever is defective - I should have taken the time to check. >> well you gotta remember, that's not how people think over here. it's always blame it on someone else. 8-\ passing the buck; the great american pasttime.

25 years, 7 months

TI 99/4A revision

by red＠bears.org

I'm attempting to gather some revision history on the old 99/4A in the interest of having complete---if insanely esoteric---information. If you've got a 99/4A, would you look at the bottom and mail me the serial number and date code (to the right of the serial number and most likely prefixed with "LTA") along with the following identifying characteristic: Black and Silver with "Solid State Software" badge Black and Silver without Beige The next step I suppose would be to identify any hardware or software revisions in there, but so far as I can tell my oldest and newest 99/4As are identical in all respects except external packaging. -- ok r. r e d @ b e a r s . o r g =========================== [ urs longa | vita brevis ]

25 years, 7 months

Another ~1960 computer kit

by kurtkilg＠geocities.com

On Sat, 19 Dec 1998 ard(a)p850ug1.demon.co.uk wrote: > Wiring electric lights isn't much fun. Designing and building an internal > step-by-step telephone exchange most certainly is. So is building > relay-logic systems. I have never seen anything to the effect of relay systems. They are often brought up on this list, and I have seen relay computers that looked quite impressive. But I have _never_ seen any explanation of how a system based on relays works. Even in the Soviet Union, where projects like 'build your own RC boat' were common in magazines, I don't recall seeing instructions on building a telephone exchange. ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

25 years, 7 months

Electrical knowledge, was Another ~1960 computer kit

by netcafe＠pirie.mtx.net.au

-----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Monday, 21 December 1998 11:12 Subject: Re: Electrical knowledge, was Another ~1960 computer kit >> A screwdriver (insulated handle!) blade touched to the top cap of the >> 1S2 would produce a healthy arc when held somewhere near chassis > >1S2 = DY86, I believe. OK, I understand now - that's the EHT rectifier, >right... Never heard of a DY86, but yes, either that or the damper diode. Can't remember. Creeping senility. >Normally just holding the screwdriver up to the cap would draw a spark - >you didn't need to have it anywhere near the chassis. And if you didn't >get a spark, you removed the top cap connector (anode) and tried again - >to the connector. A common fault was that the diode valve would >short-circuit, thus effectively short-circuiting the AC EHT via the >capacitance of the CRT. > >> if the line/eht stage was running. This practice did not survive the >> transition >> to solid state devices that disliked the spikes etc it could cause! > >No, indeed. Producing sparks in transistorised TVs/monitors is a good way >to blow semiconductors all over the chassis. When I was working on a >Barco monitor (actually off a classic-computer graphics display system), >I had an EHT flashover to my fingers (ouch!!) which took out a couple of >transistors in power supply unit. Sounds about right. Murphy. >Some valve output transformers could match pretty low loads. The famous >Williamson transformer has 8 secondary windings which can be wired in >series/parallel to match down to <1 Ohm, I think. I've seen 3 ohm secondaries on valve gear, so that sounds possible. The 1930's radio it was in had a field coil loudspeaker, first one I ever saw. Cheers Geoff Roberts Computer Room Internet Cafe Port Pirie South Australia. netcafe(a)pirie.mtx.net.au

25 years, 7 months

Electrical knowledge, was Another ~1960 computer kit

by hhacker＠gte.net

Assuming the speakers are identical, then, in parallel, the resistance of the circuit is halved, while in series, the resistance is doubled. This means that for series, the volume of the sound which is produced by the speakers is halved, and doubled for the parallel case. I am neither an electrical nor an electronic engineer but, Ohm's law is sufficient for this analysis. William R. Buckley -----Original Message----- From: Max Eskin <kurtkilg(a)geocities.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Sunday, December 20, 1998 9:27 AM Subject: Re: Electrical knowledge, was Another ~1960 computer kit >On Sun, 20 Dec 1998 ddameron(a)earthlink.net wrote: >> Another example, it surprises me how many "electrical" people do not >> understand, for example, what happens when one wires speakers in series or >> parallel. > >What _does_ happen? > >---------------------------------------------------- >Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor >

25 years, 7 months

Type 0665? This is 5.25" FH IBM HD, on topic. :)

by SUPRDAVE＠aol.com

ah, there also seems to be a 20/30 meg flavour for the 5170 as well as the EDSI 44 meg type. In a message dated 12/20/98 6:27:49 PM EST, rhblake(a)bigfoot.com writes: << Did one of us misread the Pocket PC ref? The 0667 series is the ESDI ones according to mine, 6th edition. The 0665 shows as MFM for all three variations in mine. SUPRDAVE(a)aol.com wrote: > In a message dated 12/20/98 3:12:19 PM US Eastern Standard Time, > jpero(a)pop.cgocable.net writes: > > > Spec on this pls. > > > > Can't find this info on 'net even at IBM's. > > > > Thanks! >>

25 years, 7 months

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test-drb December 1998